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Synthesis of Li2Fe0.5Mn0.5SiO4/C as Cathode Material for Lithium-Ion Batteries Using Amorphous Li2SiO3

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Abstract:

A phase-pure cathode material (Li2Fe0.5Mn0.5SiO4/C) was successfully prepared by a solid-state reaction. Initially, components used amorphous Li2SiO3 obtained from a liquid phase by solidification, FeC2O4*2H2O, MnC2O4*2H2O and glucose as a carbon source. The structure of the prepared cathode material was investigated by X-ray diffraction (XRD), the content of Fe, Mn, Si by Energy-dispersive X-ray spectroscopy (EDX) method, Li content by atomic absorption spectroscopy (AAS), the particle size and morphology by scanning electron microscopy (SEM). XRD data show that the sample on the basis of orthorhombic unit cell can be attributed to Pmn21 space group. An analysis of SEM images showed average particles size of about 250 nm. Other results obtained (EDX, AAS) correspond approximately to the theoretical data. Electrochemical performance of the cathode material was gained from cycling between 1.5-4.8V. Discharge capacity after the first cycle reached 220 mAh/g.

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Periodical:

Advanced Materials Research (Volumes 1120-1121)

Pages:

132-136

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.132

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Online since:

July 2015

Authors:

Pavel Alexandrovich Novikov, Alexey Silin, Qing Sheng Wang, Anatoly Anatolyevich Popovich

Keywords:

Cathodes Materials, Li2FeSiO4, Lithium-Ion Batteries, Solid-Phase Synthesis

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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